You can scheme all you want. It will be the Heavenly Court who decides who marries who. The Heavenly shadchans work through the worldly agents. It does not matter if the family or inlaws disapprove – or even rage fire – the hearts of all people are in the hands of Ribono shel olam. It is only our mistakes from our past life that causes interference.
Follow the advice of the Chafetz Chaim, befriend the accusers, your road becomes straighter.